Holder device for power supply rail

ABSTRACT

Provided is a holder device for a power supply rail, the holder device including a main body part positioned inside a power supply rail mounted in a vehicle interior and provided to be slidably movable in a rail direction, a head part rotatably coupled to the main body part, configured to fix a sliding movement position of the main body part inside the power supply rail, and formed to contact a pair of electrodes provided inside the power supply rail, and a fixing part formed to selectively protrude to an outside of the main body part when the head part rotates and provided to support an inner side of the power supply rail in a state in which the sliding movement position of the main body part is fixed.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims, under 35 U.S.C. § 119(a), the benefit of KoreanPatent Application No. 10-2022-0070437, filed on Jun. 10, 2022, theentire contents of which are incorporated herein by reference.

BACKGROUND Technical Field

The present disclosure relates to a holder device for a power supplyrail. More particularly, it relates to a holder device for a powersupply rail configured to be slidably movable along a power supply railand fixed in the power supply rail in a state in which a mobile deviceis mounted on the holder device.

Background

In general, a lighting fixture is mainly installed on the ceiling and isfixedly installed at a determined location at the time of initialconstruction of the lighting fixture in order to equally provide a lightsource to the indoor space.

However, since this lighting fixture is fixedly installed on theceiling, it is difficult to move and rearrange the same depending onpersonal preference or the like. Accordingly, when the lighting fixturefixedly installed thereon is moved and rearranged, complicated anddangerous work such as wire arrangement construction is required to beperformed by professional personnel.

To this end, in the case of a place in which a lighting fixture isrequired to be moved frequently, a power supply rail may be used tofacilitate movement of the lighting fixture. Further, various electronicdevices such as a fan in addition to the lighting fixture may bedetachably installed on the power supply rail, and the power supply railmay also be mounted on a place such as a wall surface as well as aceiling.

Meanwhile, in recent years, the use of a liquid crystal monitor, aterminal, and the like configured to enable a user to watch a TVbroadcast, a stored image, and navigation inside a vehicle hasincreased. Accordingly, the use of a holder configured to fix such amobile device also has increased.

However, in the case of such a holder, since the holder is mounted on avehicle air outlet and fixed thereto, damage to the air outlet may occurdue to the weight of a mobile device mounted on the holder.Additionally, when a user wants to move the location of the mobiledevice, the holder is required to be removed from the air outlet andre-mounted at a desired location, which may cause inconvenience in use.

In addition, in the state in which a mobile device is mounted on aholder, a power line is required to be separately connected to themobile device to recharge the mobile device, which may spoil theaesthetics of the interior of the vehicle and may also cause a user tobe exposed to the risk of electric shock.

Therefore, it is important not only to enable a holder having a mobiledevice mounted thereon to easily move and to be easily mounted in thevehicle, but also not to expose a power line to the outside, therebypreviously preventing problems related to the aesthetics of the interiorof the vehicle and safety of a user.

The above information disclosed in this Background section is only forenhancement of understanding of the background of the invention, andtherefore it may contain information that does not form the prior artthat is already known in this country to a person of ordinary skill inthe art.

SUMMARY OF THE DISCLOSURE

The present invention has been made in an effort to solve theabove-described problems associated with the prior art, and it is anobject of the present invention to provide a holder device for a powersupply rail, the holder device including a main body part inserted intoa power supply rail mounted in the vehicle interior and configured to beslidably movable. A sliding movement position of the main body part inthe power supply rail is fixed through the rotation of a head part, andthe main body part is additionally fixed in the power supply railthrough a fixing member configured to selectively protrude from the mainbody part when the head part rotates, thereby making it possible tosecure rigidity in the fixed state of the movement position of a mobiledevice mounted on the main body part.

In one aspect, the present invention provides a holder device for apower supply rail, the holder device including a main body partpositioned inside a power supply rail mounted in a vehicle interior andprovided to be slidably movable in a rail direction, a head partrotatably coupled to the main body part, configured to fix a slidingmovement position of the main body part inside the power supply rail,and formed to contact a pair of electrodes provided inside the powersupply rail, and a fixing part formed to selectively protrude to anoutside of the main body part when the head part rotates and provided tosupport an inner side of the power supply rail in a state in which thesliding movement position of the main body part is fixed.

In a preferred embodiment, the main body part may include a stepped partformed to be locked in the power supply rail and configured to exposethe head part rotatably coupled thereto to an outside of the powersupply rail.

In some embodiments, the main body part may be formed in a rectangularenclosure shape.

In another preferred embodiment, the head part may include a rotationguide positioned in front of the main body part and formed to be exposedto the outside of the power supply rail, the rotation guide including aconnection member to be connected to a holder, a body coupled to therotation guide inside the main body part and provided to be rotatedsimultaneously with rotation of the rotation guide, and a pair of lockanchors formed to protrude from the body and positioned to be lockedinside the power supply rail, wherein each of the pair of lock anchorsmay have a contact terminal mounted therein and configured to contactthe electrode.

In some embodiments, when the body is rotated by the rotation guide, thebody may be stably rotated along a predetermined path by allowing aplurality of guide members provided inside the main body part to beinserted into the body.

In still another preferred embodiment, the rotation guide may be formedin the same rectangular enclosure shape as a shape of the main bodyportion, and may rotate at intervals of 90°.

In yet another preferred embodiment, the lock anchor may be formed toprotrude to the outside of the main body part through a guide holeprovided in the main body part when the rotation guide rotates to belocked in a locking groove provided in the power supply rail, and may beelectrically connected to the power supply rail through groundingbetween the electrode and the contact terminal.

In some embodiments, the locking groove may be provided at each of theupper and lower portions of the power supply rail.

In still yet another preferred embodiment, the power supply rail mayinclude an electrode fixing part provided inside the locking groove tofix the electrode.

In still yet another preferred embodiment, the electrode fixing partconfigured to fix the electrode in a direction toward the contactterminal by elasticity thereof.

In a further preferred embodiment, the fixing part may include a fixingmember inserted into the body and configured to selectively protrude tothe outside of the main body part when the body rotates, and a cammovement groove formed on an outer circumferential surface of the fixingmember, wherein the cam movement groove may have a protruding memberinserted thereinto, the protruding member being provided inside thebody, and may form a path configured to allow the protruding member tomove therealong when the body rotates.

In another further preferred embodiment, the cam movement groove may beformed in a spiral shape so that the cam movement groove is pressed bythe protruding member moving along the path when the body rotateswhereby the fixing member may protrude to the outside of the main bodypart.

In still another further preferred embodiment, the fixing part mayfurther include an elastic member mounted on one side of the fixingmember and formed to selectively contact the inner side of the powersupply rail when the fixing member protrudes.

In another aspect, the present invention provides a holder device for apower supply rail, the holder device including a main body partpositioned inside a power supply rail mounted on a front of a dashboardforming a vehicle interior and provided to be slidably movable in a raildirection, a head part rotatably coupled to the main body part andconfigured to fix a sliding movement position of the main body partinside the power supply rail, the head part including a connectionmember to be connected to a holder, and a fixing part formed toselectively protrude to an outside of the main body part when the headpart rotates and provided to support an inner side of the power supplyrail in a state in which the sliding movement position of the main bodypart is fixed.

In a preferred embodiment, at least one or more of the main body partsmay be formed to be positioned together inside the power supply rail,and the head part may be rotatably coupled to the main body part wherebyeach of the holders having different mobile devices mounted thereon maybe mounted on a corresponding one of the connection members.

In another embodiment, a vehicle comprising the holder device may beprovided. The power supply rail may be mounted in a vehicle interior.

Other aspects and preferred embodiments of the invention are discussedinfra.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features of the present invention will now bedescribed in detail with reference to certain exemplary embodimentsthereof illustrated in the accompanying drawings which are givenhereinbelow by way of illustration only, and thus are not limitative ofthe present invention, and wherein:

FIG. 1 is a view showing a configuration of a holder device for a powersupply rail according to an embodiment of the present invention;

FIG. 2 is a view showing an internal structure of the holder device forthe power supply rail according to the embodiment of the presentinvention;

FIG. 3 is a view showing an operating state of the holder device for thepower supply rail according to the embodiment of the present invention;

FIG. 4 is a view showing an internal structure according to theoperating state of the holder device for the power supply rail accordingto the embodiment of the present invention;

FIG. 5 is a view showing a cam movement groove of the holder device forthe power supply rail according to the embodiment of the presentinvention;

FIG. 6 is a view showing a mounted state of the holder device for thepower supply rail according to the embodiment of the present invention;

FIG. 7 is a cross-sectional view of the holder device for the powersupply rail according to the embodiment of the present invention, takenalong line A-A′ of FIG. 6 ;

FIG. 8 is a view showing a fixing part of the holder device for thepower supply rail according to the embodiment of the present invention;

FIG. 9 is a view showing electrical connection between an electrode anda contact terminal with respect to the holder device for the powersupply rail according to the embodiment of the present invention; and

FIG. 10 is a view showing a state in which a mobile device is mounted onthe holder device for the power supply rail according to the embodimentof the present invention.

It should be understood that the appended drawings are not necessarilyto scale, presenting a somewhat simplified representation of variouspreferred features illustrative of the basic principles of theinvention. The specific design features of the present invention asdisclosed herein, including, for example, specific dimensions,orientations, locations, and shapes, will be determined in part by theparticular intended application and use environment.

In the figures, reference numbers refer to the same or equivalent partsof the present invention throughout the several figures of the drawing.

DETAILED DESCRIPTION

It is understood that the term “vehicle” or “vehicular” or other similarterm as used herein is inclusive of motor vehicles in general such aspassenger automobiles including sports utility vehicles (SUV), buses,trucks, various commercial vehicles, watercraft including a variety ofboats and ships, aircraft, and the like, and includes hybrid vehicles,electric vehicles, plug-in hybrid electric vehicles, hydrogen-poweredvehicles and other alternative fuel vehicles (e.g. fuels derived fromresources other than petroleum). As referred to herein, a hybrid vehicleis a vehicle that has two or more sources of power, for example bothgasoline-powered and electric-powered vehicles.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting of the disclosure.As used herein, the singular forms “a,” “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise. These terms are merely intended to distinguish one componentfrom another component, and the terms do not limit the nature, sequenceor order of the constituent components. It will be further understoodthat the terms “comprises” and/or “comprising,” when used in thisspecification, specify the presence of stated features, integers, steps,operations, elements, and/or components, but do not preclude thepresence or addition of one or more other features, integers, steps,operations, elements, components, and/or groups thereof. As used herein,the term “and/or” includes any and all combinations of one or more ofthe associated listed items. Throughout the specification, unlessexplicitly described to the contrary, the word “comprise” and variationssuch as “comprises” or “comprising” will be understood to imply theinclusion of stated elements but not the exclusion of any otherelements.

Hereinafter, preferred embodiments according to the present inventionwill be described in detail with reference to the accompanying drawings.

Advantages and features of the present invention and a method ofachieving the same will become apparent with reference to theembodiments described below in detail with reference to the accompanyingdrawings.

However, the present invention is not limited to the embodimentsdisclosed below, but will be implemented in various different forms. Theembodiments are provided to ensure that the disclosure of the presentinvention is complete, and to fully convey the scope of the invention tothose skilled in the art to which the present invention pertains. Thepresent invention is only defined by the scope of the claims.

In addition, in the description of the present invention, if it isdetermined that related known techniques or the like may obscure thegist of the present invention, a detailed description thereof will beomitted.

FIG. 1 is a view showing a configuration of a holder device for a powersupply rail according to an embodiment of the present invention, FIG. 2is a view showing an internal structure of the holder device for thepower supply rail according to the embodiment of the present invention,and FIG. 3 is a view showing an operating state of the holder device forthe power supply rail according to the embodiment of the presentinvention.

FIG. 4 is a view showing an internal structure according to theoperating state of the holder device for the power supply rail accordingto the embodiment of the present invention, FIG. 5 is a view showing acam movement groove of the holder device for the power supply railaccording to the embodiment of the present invention, FIG. 6 is a viewshowing a mounted state of the holder device for the power supply railaccording to the embodiment of the present invention, and FIG. 7 is across-sectional view of the holder device for the power supply railaccording to the embodiment of the present invention, taken along lineA-A′ of FIG. 6 .

FIG. 8 is a view showing a fixing part of the holder device for thepower supply rail according to the embodiment of the present invention,FIG. 9 is a view showing electrical connection between an electrode anda contact terminal with respect to the holder device for the powersupply rail according to the embodiment of the present invention, andFIG. 10 is a view showing a state in which a mobile device is mounted onthe holder device for the power supply rail according to the embodimentof the present invention.

As shown in FIGS. 1 and 2 , the holder device for the power supply railaccording to the present embodiment includes a main body part 100, ahead part 200, and a fixing part 300.

The main body part 100 has a length in the horizontal direction in thevehicle interior and is located inside a mounted power supply rail 10(refer to FIGS. 6 and 10 ).

For example, the main body part 100 may be located in the power supplyrail 10 mounted on the front side of a dashboard 1.

Here, the main body part 100 may be slidably movable in the raildirection in a state of being inserted into an inlet of the power supplyrail 10, and may be formed in a rectangular enclosure shape so as not tobe rotated.

Additionally, the main body part 100 may include a stepped part 110configured to form a step to be locked at the entrance of the powersupply rail 10, and as such, the head part 200 coupled to the steppedpart 110 may be exposed to the outside of the power supply rail 10.

The head part 200 is rotatably coupled to the main body part 100, morespecifically to the stepped part 110, and fixes the sliding movementposition of the main body part 100 in the rail direction inside thepower supply rail 10.

To this end, the head part 200 includes a rotation guide 210, a body220, and a lock anchor 230.

The rotation guide 210 is coupled to the main body part 100, and whenthe stepped part 110 is locked at the entrance of the power supply rail10, the rotation guide 210 is formed to be exposed to the outside of thepower supply rail 10.

The rotation guide 210 includes a connection member 212 configured to beconnected to a holder 2 configured to enable a personal mobile devicesuch as a tablet PC to be mounted thereon.

The rotation guide 210 is provided to enable a user to grip the same,and when the user rotates the rotation guide 210, the main body part 100locked at the entrance of the power supply rail 10 by the stepped part110 is formed to be rotatable independently in a fixed state.

That is, the rotation guide 210 is formed in the shape of a rectangularenclosure in the same manner as the shape of the stepped part 110 of themain body part 100. Accordingly, as shown in FIGS. 3 and 4 , therotation of the rotation guide 210 may be performed at intervals of 90°to be disposed on the same line as the main body part 100 duringrotation thereof.

The body 220 is coupled to the rotation guide 210 inside the main bodypart 100, and is provided to be rotated together when the rotation guide210 rotates.

Referring to FIGS. 6 and 7 , when the body 220 is rotated by therotation guide 210, the body 220 may be stably rotated along apredetermined path by allowing a plurality of guide members 120 providedinside the main body part 100 to be inserted into the body 220.

Further, a pair of lock anchors 230 is formed to protrude from the body220 and is selectively locked inside the power supply rail 10, and acontact terminal 232 extending from the outside of the rotation guide210 is mounted to be in contact with a pair of electrodes 12 provided onthe upper and lower portions of the power supply rail 10, respectively.

As shown in FIGS. 3 and 4 , when the lock anchor 230 is rotated with thebody 220 when the rotation guide 210 rotates clockwise, the sameprotrudes to the outside of the main body part 100 through a guide holeH provided at each of the upper and lower portions of the main body part100 (refer to FIGS. 1 and 3 ), and then is locked in a locking groove 10a provided inside the power supply rail 10.

In other words, the locking groove 10 a is provided at each of the upperand lower portions of the power supply rail 10, and when the lock anchor230 is locked in the locking groove 10 a, the position of the main bodypart 100 may be fixed inside the power supply rail 10. As describedabove, the lock anchor 230 is normally disposed in the horizontaldirection for the sliding movement of the main body part 100 (refer toFIGS. 1 and 2 ), and when the body 220 is rotated together with therotation guide 210 during the rotation of the rotation guide 210, thelock anchor 230 is disposed in the vertical direction to be locked inthe locking groove 10 a, and as such, the position of the main body part100 inside the power supply rail 10 may be fixed (refer to FIGS. 3 and 4).

Here, an electrode fixing part 11 configured to fix the position of theelectrode 12 may be provided inside the locking groove 10 a of the powersupply rail 10, as shown in FIG. 9 , and the electrode fixing part 11 isfixed in the direction toward the contact terminal 232 protruding to theoutside of the lock anchor 230 when the lock anchor 230 is locked in thelocking groove 10 a.

Preferably, the electrode fixing part 11 may be made of a materialhaving elasticity. Accordingly, the electrode fixing part 11 maintainsconstant pressure on the electrode 12 in the direction toward thecontact terminal 232, thereby achieving stable electrical contactbetween the electrode 12 and the contact terminal 232.

Meanwhile, the fixing part 300 is formed to selectively protrude to theoutside of the main body part 100 when the head part 200 rotates.

Accordingly, the fixing part 300 is provided to support an inner side 10b of the power supply rail 10 in the state in which the lock anchor 230is inserted into the locking groove 10 a and locked therein, that is,the sliding movement position of the main body part 100 in the raildirection is fixed as described above (refer to FIG. 7 ).

To this end, the fixing part 300 includes a fixing member 310 and a cammovement groove 320, as shown in FIG. 5 .

The fixing member 310 is inserted into the body 220, and when the body220 is rotated by the rotation guide 210, the fixing member 310 isformed to selectively move to the rear of the main body part 100 and toprotrude to the outside of the main body part 100.

The cam movement groove 320 is formed on the outer circumferentialsurface of the fixing member 310, and a protruding member 222 providedin the body 220 is inserted into the cam movement groove 320 (refer toFIG. 7 ). Further, the cam movement groove 320 forms a path configuredto enable the protruding member 222 to move along a predetermined pathwhen the body 220 rotates.

The cam movement groove 320 preferably has a spiral shape so that thefixing member 310 protrudes to the outside of the main body part 100 bythe spiral shape thereof when the cam movement groove 320 is pressed bythe protruding member 222 moving around the predetermined path duringthe rotation of the body 220.

In other words, when the rotation guide 210 rotates and the body 220 isrotated at an angle of 90° along the guide member 120, the protrudingmember 222 is inserted into the cam movement groove 320. Here, since theshape of the cam movement grove 320 is made in the form of a spiral, theprotruding member 222 moves along the path of the cam movement groove320 to move the fixing member 310. As a result, the fixing member 310 ismoved to protrude to the rear of the main body part 100 and is in closecontact with the inner side 10 b of the power supply rail 10, therebyfixing and supporting the main body part 100.

Preferably, the fixing part 300 may further include an elastic member330. The elastic member 330 is mounted on one side of the fixing member310, as shown in FIG. 8 . Here, the elastic member 330 is formed toselectively contact the inner side 10 b of the power supply rail 10 whenthe fixing member 310 protrudes, thereby making it possible to stablyfix and support the main body part 100.

That is, when the fixing member 310 is moved to protrude to the rear ofthe main body part 100 and is in close contact with the inner side 10 bof the power supply rail 10, the elastic member 330 prevents slippingbetween the fixing member 310 and the inner side 10 b during closecontact therebetween, thereby making it possible to fix and support themain body part 100 more stably.

As a result, in this embodiment, when the rotation guide 210 is rotatedto fix the main body part 100 configured to slide along the power supplyrail 10, the body 220 is rotated together inside the main body part 100.Accordingly, the pair of lock anchors 230 is locked in the lockinggroove 10 a, thereby making it possible to form two support areas insidethe power supply rail 10 and to stably fix the main body part 100.

In addition, when the body 220 is rotated as described above, theprotruding member 222 moves along the cam movement groove 320 having aspiral shape and pushes the fixing member 310 toward the rear of themain body part 100. In this manner, the fixing member 310 moves towardthe rear of the main body part 100. Accordingly, the fixing member 310together with the pair of lock anchors 230 also forms an additionalsupport area and presses the inner side 10 b of the power supply rail10, thereby making it possible to effectively secure rigidity in thefixed state of the sliding movement position of the main body part 100.

In addition, in this embodiment, since the configuration of a separatelocking lever configured to fix the sliding movement position of themain body part 100 in the power supply rail 10 can be removed,appearance quality can be improved. Further, since it is possible to fixand release the sliding movement position of the main body part 100 onlyby rotating the rotation guide 210, one-handed operation may beperformed, and thus usability may be enhanced.

Meanwhile, in this embodiment, as described with reference to thedrawings, the power supply rail 10 is installed with a predeterminedlength on the dashboard 1 of the vehicle interior, and a holder deviceis mounted on the power supply rail 10, but the above-mentionedconfiguration only corresponds to one embodiment and is not limitedthereto. For example, in addition to the dashboard 1, the power supplyrail 10 may be installed on a door trim or the like so that a holderdevice may be mounted at a corresponding position.

Further, in the case of the connection member 212 provided in therotation guide 210 of the head part 200, this embodiment shows that theconnection member 212 is coupled to the rear surface of the holder 2 inthe form of a clip (refer to FIG. 7 ). Meanwhile, as long as the holder2 is coupled to the connection member 212, various other structureshaving the same purpose may be applied to the connection member 212.

Additionally, as shown in FIG. 10 , since a plurality of holder devicescan be mounted together on the power supply rail 10, mobile devices suchas a mobile phone and a tumbler may be simultaneously mounted thereon,and may be selectively slidable to move to a desired position and fixedthereat. Accordingly, the type and location of the mobile device may bechanged and used depending on user convenience. Further, since theelectrode 12 and the contact terminal 232 electrically contact eachother inside the power supply rail 10 to perform recharging, it ispossible to eliminate exposure of a plurality of members such as acharging cable, thereby maintaining the vehicle interior in a cleanstate.

According to the present invention, a main body part is inserted into apower supply rail mounted in the vehicle interior and is slidablymovable, and a sliding movement position of the main body part in thepower supply rail is fixed through the rotation of a head part. Further,the main body part may be additionally fixed in the power supply railthrough a fixing member configured to selectively protrude from the mainbody part when the head part rotates, thereby having an effect ofsecuring rigidity in the fixed state of the movement position of amobile device mounted on the main body part.

Further, the present invention can eliminate the configuration of aseparate locking lever configured to fix the sliding movement positionof the main body part in the power supply rail, thereby having an effectof improving the appearance quality.

Additionally, since the present invention can fix and release thesliding movement position of the main body part only by rotating thehead part, one-handed operation may be performed, thereby having aneffect of improving usability.

As is apparent from the above description, according to the presentinvention, a main body part is inserted into a power supply rail mountedin the vehicle interior and is slidably movable. Here, a slidingmovement position of the main body part in the power supply rail isfixed by the rotation of a head part. Further, the main body part may beadditionally fixed in the power supply rail using a fixing memberconfigured to selectively protrude from the main body part when the headpart rotates. In this manner, it is possible to have an effect ofsecuring rigidity in the fixed state of the movement position of amobile device mounted on the main body part.

Further, according to the present invention, it is possible to eliminatethe configuration of a separate locking lever configured to fix thesliding movement position of the main body part in the power supplyrail, thereby having an effect of improving the appearance quality.

Additionally, according to the present invention, since the slidingmovement position of the main body part in the power supply rail can befixed and released only by rotating the head part, one-handed operationmay be performed, thereby having an effect of improving usability.

The present invention has been described in detail with reference topreferred embodiments thereof, but the embodiments are merely exemplaryand are not to be construed as limiting the present invention. It willbe appreciated by those skilled in the art that various modificationsmay be made in these embodiments, and it will be understood that all ora part of the embodiments may be selectively combined and configured.Accordingly, the true technical protection scope of the presentinvention should be determined by the technical spirit of the appendedclaims.

What is claimed is:
 1. A holder device for a power supply rail, theholder device comprising: a main body part positioned inside a powersupply rail and provided to be slidably movable in a rail direction; ahead part rotatably coupled to the main body part, configured to fix asliding movement position of the main body part inside the power supplyrail, and formed to contact a pair of electrodes provided inside thepower supply rail; and a fixing part formed to protrude to an outside ofthe main body part when the head part rotates and provided to support aninner side of the power supply rail in a state in which the slidingmovement position of the main body part is fixed.
 2. The holder deviceof claim 1, wherein the main body part comprises a stepped part formedto be locked in the power supply rail and configured to expose the headpart rotatably coupled thereto to an outside of the power supply rail.3. The holder device of claim 1, wherein the head part comprises: arotation guide positioned in front of the main body part and formed tobe exposed to the outside of the power supply rail, the rotation guidecomprising a connection member to be connected to a holder; a bodycoupled to the rotation guide inside the main body part and provided tobe rotated simultaneously with rotation of the rotation guide; and apair of lock anchors formed to protrude from the body and positioned tobe locked inside the power supply rail, wherein each of the pair of lockanchors has a contact terminal mounted therein and configured to contactthe electrode.
 4. The holder device of claim 3, wherein the rotationguide is formed in the same rectangular enclosure shape as a shape ofthe main body portion, and rotates at intervals of 90°.
 5. The holderdevice of claim 3, wherein when the body is rotated by the rotationguide, the body is stably rotated along a predetermined path by allowinga plurality of guide members provided inside the main body part to beinserted into the body.
 6. The holder device of claim 3, wherein thelock anchor is formed to protrude to the outside of the main body partthrough a guide hole provided in the main body part when the rotationguide rotates to be locked in a locking groove provided in the powersupply rail, and is electrically connected to the power supply railthrough grounding between the electrode and the contact terminal.
 7. Theholder device of claim of 6, wherein the locking groove is provided ateach of the upper and lower portions of the power supply rail.
 8. Theholder device of claim 6, wherein the power supply rail comprises anelectrode fixing part provided inside the locking groove to fix theelectrode.
 9. The holder device of claim 6, wherein the electrode fixingpart configured to fix the electrode in a direction toward the contactterminal by elasticity thereof.
 10. The holder device of claim 3,wherein the fixing part comprises: a fixing member inserted into thebody and configured to selectively protrude to the outside of the mainbody part when the body rotates; and a cam movement groove formed on anouter circumferential surface of the fixing member.
 11. The holderdevice of claim 10, wherein the cam movement groove has a protrudingmember inserted thereinto, the protruding member being provided insidethe body, and forms a path configured to allow the protruding member tomove therealong when the body rotates.
 12. The holder device of claim11, wherein the cam movement groove is formed in a spiral shape so thatthe cam movement groove is pressed by the protruding member moving alongthe path when the body rotates whereby the fixing member protrudes tothe outside of the main body part.
 13. The holder device of claim 10,wherein the fixing part further comprises an elastic member mounted onone side of the fixing member and formed to selectively contact theinner side of the power supply rail when the fixing member protrudes.14. The holder device of claim 1, wherein the main body part is formedin a rectangular enclosure shape.
 15. The holder device of claim 1,wherein the power supply rail is mounted in a vehicle interior.
 16. Aholder device for a power supply rail, the holder device comprising: amain body part positioned inside a power supply rail and provided to beslidably movable in a rail direction; a head part rotatably coupled tothe main body part and configured to fix a sliding movement position ofthe main body part inside the power supply rail, the head partcomprising a connection member to be connected to a holder; and a fixingpart formed to selectively protrude to an outside of the main body partwhen the head part rotates and provided to support an inner side of thepower supply rail in a state in which the sliding movement position ofthe main body part is fixed.
 17. The holder device of claim 16, whereinat least one or more of the main body parts are formed to be positionedtogether inside the power supply rail, and the head part is rotatablycoupled to the main body part whereby each of the holders havingdifferent mobile devices mounted thereon is mounted on a correspondingone of the connection members.
 18. The holder device of claim 16,wherein the power supply rail is mounted on a front of a dashboardforming a vehicle interior
 19. A vehicle comprising the holder device ofclaim
 1. 20. The vehicle of claim 19, wherein the power supply rail ismounted in a vehicle interior.